mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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/**
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* Optimiser component that identifies functions to be inlined.
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*/
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#include <libyul/optimiser/InlinableExpressionFunctionFinder.h>
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#include <libyul/optimiser/OptimizerUtilities.h>
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#include <libyul/AST.h>
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using namespace solidity;
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using namespace solidity::yul;
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void InlinableExpressionFunctionFinder::operator()(Identifier const& _identifier)
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{
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checkAllowed(_identifier.name);
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ASTWalker::operator()(_identifier);
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}
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void InlinableExpressionFunctionFinder::operator()(FunctionCall const& _funCall)
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{
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checkAllowed(_funCall.functionName.name);
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ASTWalker::operator()(_funCall);
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}
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void InlinableExpressionFunctionFinder::operator()(FunctionDefinition const& _function)
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{
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if (_function.returnVariables.size() == 1 && _function.body.statements.size() == 1)
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{
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YulString retVariable = _function.returnVariables.front().name;
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Statement const& bodyStatement = _function.body.statements.front();
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if (std::holds_alternative<Assignment>(bodyStatement))
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{
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Assignment const& assignment = std::get<Assignment>(bodyStatement);
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if (assignment.variableNames.size() == 1 && assignment.variableNames.front().name == retVariable)
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{
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// TODO: use code size metric here
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// We cannot overwrite previous settings, because this function definition
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// would not be valid here if we were searching inside a functionally inlinable
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// function body.
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assertThrow(m_disallowedIdentifiers.empty() && !m_foundDisallowedIdentifier, OptimizerException, "");
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m_disallowedIdentifiers = std::set<YulString>{retVariable, _function.name};
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std::visit(*this, *assignment.value);
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if (!m_foundDisallowedIdentifier)
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m_inlinableFunctions[_function.name] = &_function;
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m_disallowedIdentifiers.clear();
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m_foundDisallowedIdentifier = false;
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}
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}
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}
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ASTWalker::operator()(_function.body);
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}
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